Ventilating cowl



April 17, 1934. E, c. DEARING VENTILATING COWL Filed Oct. 21. 1951 Patented Apr. 17, 1934 UNITED STATES PATENT OFFICE 7 Claims.

This invention relates to ventilators, and especially to the class of ventilators known as cowls, so my invention may be properly termed a ventilating cowl.

One object of my invention is to provide an improved ventilating cowl which automatically effects a strong draft therethrough when the wind is blowing in any direction.

Another object is to provide a ventilating cowl of this character which effectually sheds water, snow and hail so that none of it enters the interior of the cowl.

Another object of the invention is to provide a cowl of this character with an improved inverted cone whose geometric elements are composed of curves which are known as anti-friction curves, whereby the draft through the cowl is retarded only the minimum degree.

A further object is to provide the cowl with a hollow element which consists of said inverted cone and of a weather-shedding cone united with one another for producing the dual function of shedding the weather and spreading the air or fluid which rises through the cowl.

A 'further'object is to provide a cowl of this character with a frusto-conical hood which surrounds the dual cone member and is spaced therefrom so as to combine with them for shedding the weather and for inducing the draft through the cowl.

Other objects and important features are pointed out or implied in the following details of description, in connection with the accompanying drawing in which:

Figure 1 is an upright view partly in elevation and partly in vertical section, the section being taken along the line 11 of Figure 2;

Figure 2 is a horizontal sectional View along the line 2-2 of Figure 1; t Figure 3 is a view similar to Figure 2, but showing a modified form of the invention in which the arcuate or semicylindrical wind-deflectors-are arranged and secured in a manner different from that shown in Figure 2, the section being along the line 3-3 of Fig. 4;

Figure 41s a detail view showing the modified structure of Fig.3 in vertical section.

Referring to these drawings in detail, in which similar reference characters correspond to similar parts in the several views, my invention isnow described in detail as follows:

The flue or stack of the ventilator is indicated at 5, and according to the form shown in Figure 1, there are two series of curved plates or flutes united with the stack. The flutes of the inner series have their lower ends in direct contact with the upper end of the stack, at the outer side thereof, and are secured thereto by rivets or other appropriate means. In this connection, it may be explained that while rivets are shown as a means of fastening the parts of this device to one another, spot-welding or other appropriate means may be employed instead of the rivets; so the word united is used as being broad enough to cover rivets or any means for securing the parts to one another. The said inner flutes or winddeflectors are shown at 6, and the outer wind-deflectors are shown at 7. As illustrated in Figure 2, these wind-deflectors are substantially semi-cylindrical and reversely disposed with respect to the circumference of the cowl, that is, those of the inner series are concaved on their outer sides, and those of the outer series are concaved on their inner sides. Moreover, those of the outer series bridge the gaps or air spaces between those of the inner series; and those of the inner series bridge the gaps or air spaces between those of the outer series. However, the edges of these winddeflectors are spaced from one another a distance substantially equal to half the width of the air spaces 30 between the air deflectors of each series, so that the outer air can pass freely and in considerable volume through the spaces between the edges of the wind-deflectors, but is baflled thereby and turned into compound curves while entering the 5 interior of the cowl. While the Wind is entering any side of the cowl, between the wind-deflectors, a part of the draft through the cowl is forced laterally between the deflectors at the leeward side, while the remainder of the draft is spread bythe 0 cone 8 and passes out between the peripheral edge of this cone and the upwardly and inwardly inclined or frusto-conical hood 9. The frustoconical shape'of the hood 9 and the upper end of the weather-shedding cone 10 combine to produce a partial vacuum over the cowl, thereby inducing the draft up through the hood 9, hence through the stack 5 and the space surrounded by the curved deflectors 6 and '7.

In Figures 1 and 2, the inner deflectors or curved 1 plates have their upper ends united with an annular strip or ring 11 which holds them in the proper relation to one another, as their lower ends are held by the stack 5. Similar rings 12 and 13 are provided to hold the outer curved plates 5 7 in the proper relation to one another, and this outer series is spaced and held from the inner series by means of substantially V-shaped brackets 14. I have shown these brackets 14 only at the lower ends of the deflecting plates, for their upper ends are secured to inverted V-shaped brackets 15 which extend upward and are united with brackets 16 which support the hood 9. The upper ends of the brackets 15 extend under the flange 17 which unites the cones 8 and 10 in the manner shown or in any appropriate manner.

In lieu of the construction and arrangement shown in Figures 1 and 2, I may provide rings or annular strips 12a and 13a, and may secure the upper and lower ends of the inner and outer defleeting plates 6a and 7a to these rings by spotwelding or other appropriate means. It will be seen that the arrangement of the deflecting plates is substantially the same in both forms of the invention, with respect to the position of the inner series in relation to the outer series. Therefore, substantially the same forms of brackets 15, 15a and 16 are used for both forms of the invention. Moreover, the deflector plates of the inner series, or some of them, are united with the upper part of the stack 5, so that both series are supported by the stack, the inner series supporting the outer series through the medium of the rings 12a and 13a.

In both forms of the invention, an annular wind-shield 18 is supported by brackets 19 which are united with the ring 13 or 13a and with the outer series of deflector plates '7 or 7a. The windshield 18 is downwardly and inwardly converging so as to prevent excessive upward drafts through the annular space occupied by the deflectors 6 and 7. The lower end of the shield 18 is spaced (at 20) from the stack 5, thus providing an outlet for any products of condensation or other liquid or solid matter which gets into the annular space occupied by the deflector plates.

Although I have described these forms of my invention specifically, it is not my intention to limit my patent protection to these exact details of construction and arrangement, for the invention is susceptible of numerous changes within the scope of the inventive ideas as implied and claimed.

What I claim as my invention is:

1. In a ventilating cowl, the combination of a hollow stack having an open upper end, a series of wind-deflecting plates united with the outer side of the stack at said open upper end and having their outer sides concaved, a second series of wind-deflecting plates having their inner sides concaved and being arranged in alternate relation with the wind-deflecting plates of the inner series so that each outer wind-deflecting plate bridges the gap between two adjacent inner wind-deflecting plates while providing airpassages between the edges of the inner and outer wind-deflecting plates, means being provided for supporting the outer series of wind-deflecting plates around the inner series of wind-deflecting plates, a dual cone-member including a weathershedding upper part and a draft-spreading lower part, the said lower part being an inverted cone having upwardly and outwardly curved elements, and means for supporting the dual cone-member on the stack through the medium of said inner series of wind-deflecting plates.

2. In a ventilating cowl, the combination of a hollow stack having an open upper end, a series of wind-deflecting plates united with the outer side of the stack at said open upper end and having their outer ends concaved, a second series of wind-deflecting plates having their inner sides concaved and being arranged in alternate relation with the wind-deflecting plates of the inner series so that each outer wind-deflecting plate bridges the gap between two adjacent inner wind-deflecting plates while providing airpassages between the edges of the inner and outer wind-deflecting plates, means being provided for supporting the outer series of winddeflecting plates around the inner series of winddefiecting plates, brackets supported by the inner series of wind-deflecting plates, an inverted draft-spreading cone supported by said brackets, and a wind-deflecting hood having an upwardly converging wall and being supported around and spaced from said draft-spreading cone.

3. In a ventilating cowl, the combination of a hollow stack having an open upper end, a series of wind-deflecting plates united with the outer side of the stack at said open upper end and having their outer sides concaved, a second series of wind-deflecting plates having their inner sides concaved and being arranged in alternate relation with the wind-deflecting plates of the inner series so that each outer wind-deflecting plate bridges the gap between two adjacent inner winddefiecting plates while providing air-passages between the edges of the inner and outer winddeflecting plates, means being provided for supporting the outer series of wind-deflecting plates around the inner series of wind-deflecting plates, brackets supported by the inner series of winddeflecting plates, an inverted draft-spreading cone supported by said brackets and depending in the space surrounded by the said inner series, a wind-deflecting hood having an upwardly and inward1y converging wall and supported around and in spaced relation to the draft-spreading cone, and a weather-shedding cone supported by said brackets and extending through the upper end of said hood.

4. In a ventilating cowl, the combination of a hollow stack having an open upper end, a series of wind-deflecting plates united with the outer side of the stack at said open upper end and having their outer sides concaved, a second series of wind-deflecting plates having their inner sides concaved and being arranged in alternate relation with the wind-deflecting plates of the inner series so that each outer wind-deflecting plate bridges the gap between two adjacent inner wind-deflecting plates while providing air-passages between the edges of the inner and outer wind-deflecting plates, means being provided for supporting the outer series of wind-deflecting plates around the inner series of wind-deflecting plates, an annular wind-shield having an inwardly and downwardly converging wall supported in such position that its upper end is adjacent to the lower end of said outer series of wind-deflecting plates while its lower end is around and spaced from said stack.

5. In a ventilating cowl, the combination of a hollow stack having an open upper end, a series of spaced wind-deflecting plates united with the outer side of the stack around said open upper end, a second series of spaced wind-deflecting plates provided with means for supporting them around the inner series of wind-deflecting plates and in alternate relation to the plates of the inner series so that the respective plates of the outer series bridge the spaces between the plates of the inner series and are spaced from the latter to provide air-passages between the inner and outer plates, a draft-spreading inverted cone provided with means to support it on the stack in such relation that it is partly within and partly above the series of inner deflecting plates, a winddefiecting hood supported around and spaced from the upper end of said draft-spreading cone, and an annular wind-shield provided with means to support it in such position that its upper end is adjacent to the lower end of said outer series of Wind-deflecting plates while its lower end is around and spaced from said stack at a level below the series of outer deflecting plates.

6. In a ventilating cowl the combination of a hollow stack having an open upper end a series of wind-deflecting plates united with the outer side of the stack at said upper end, a second series of wind-deflecting plates arranged in alternate relation with the wind-deflecting plates of the inner series so that each outer wind-deflecting plate bridges the gap between two adjacent inner wind-deflecting plates while providing air passages between the edges of the inner and outer wind-deflecting plates, means being provided for supporting the outer series of wind-deflecting plates around the inner series of wind-deflecting plates, and a dual cone member including a weather-shedding upper part and a draft-spreading lower part, said lower part being an inverted cone, and means for supporting the dual-cone member on the stack through the medium of said inner series of wind-deflecting plates.

7. In a ventilating cowl, the combination of a hollow stack having an open upper end, an annular arrangement of upright wind-deflecting plates having means to secure their lower ends to the upper end of said stack in such relation that they are spaced from the stack and from one another and thus provide air-passages from the exterior to the interior of the said annular arrangement, means secured on and supported by the upper ends of said plates for shedding water and for deflecting air upwardly, and an annular wind-shield having means to support it in such relation that its upper end is adjacent to said wind-deflecting plates while its lower end is around and spaced from said stack below said plates.

EDWARD C, DEARING. 

